Scratches in the bore will have no effect on the bullet unless they are very deep. Any damage, even slight, the crown will have a very negative effect on the bullet as it leaves the muzzle. The gases need to vent into the air evenly all the way around the bullet's base as it leaves or it will tip off axis. Have it checked out by a gunsmith. Recrowning is cheap and easy once you have the correct tools. Never try to clean up a crown without a cutter guided by a pilot in the bore or you will just make it worse.